'\" t
.\"     Title: ALTER STATISTICS
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2021
.\"    Manual: PostgreSQL 13.3 Documentation
.\"    Source: PostgreSQL 13.3
.\"  Language: English
.\"
.TH "ALTER STATISTICS" "7" "2021" "PostgreSQL 13.3" "PostgreSQL 13.3 Documentation"
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.SH "NAME"
ALTER_STATISTICS \- change the definition of an extended statistics object
.SH "SYNOPSIS"
.sp
.nf
ALTER STATISTICS \fIname\fR OWNER TO { \fInew_owner\fR | CURRENT_USER | SESSION_USER }
ALTER STATISTICS \fIname\fR RENAME TO \fInew_name\fR
ALTER STATISTICS \fIname\fR SET SCHEMA \fInew_schema\fR
ALTER STATISTICS \fIname\fR SET STATISTICS \fInew_target\fR
.fi
.SH "DESCRIPTION"
.PP
\fBALTER STATISTICS\fR
changes the parameters of an existing extended statistics object\&. Any parameters not specifically set in the
\fBALTER STATISTICS\fR
command retain their prior settings\&.
.PP
You must own the statistics object to use
\fBALTER STATISTICS\fR\&. To change a statistics object\*(Aqs schema, you must also have
CREATE
privilege on the new schema\&. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have
CREATE
privilege on the statistics object\*(Aqs schema\&. (These restrictions enforce that altering the owner doesn\*(Aqt do anything you couldn\*(Aqt do by dropping and recreating the statistics object\&. However, a superuser can alter ownership of any statistics object anyway\&.)
.SH "PARAMETERS"
.PP
.PP
\fIname\fR
.RS 4
The name (optionally schema\-qualified) of the statistics object to be altered\&.
.RE
.PP
\fInew_owner\fR
.RS 4
The user name of the new owner of the statistics object\&.
.RE
.PP
\fInew_name\fR
.RS 4
The new name for the statistics object\&.
.RE
.PP
\fInew_schema\fR
.RS 4
The new schema for the statistics object\&.
.RE
.PP
\fInew_target\fR
.RS 4
The statistic\-gathering target for this statistics object for subsequent
\fBANALYZE\fR(7)
operations\&. The target can be set in the range 0 to 10000; alternatively, set it to \-1 to revert to using the maximum of the statistics target of the referenced columns, if set, or the system default statistics target (default_statistics_target)\&. For more information on the use of statistics by the
PostgreSQL
query planner, refer to
Section\ \&14.2\&.
.RE
.SH "COMPATIBILITY"
.PP
There is no
\fBALTER STATISTICS\fR
command in the SQL standard\&.
.SH "SEE ALSO"
CREATE STATISTICS (\fBCREATE_STATISTICS\fR(7)), DROP STATISTICS (\fBDROP_STATISTICS\fR(7))
